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SBM_SETSCROLLINFO (Compact 2013)

  • Artículo

3/28/2014

This message is sent by an application to set the parameters of a scroll bar.

Syntax

SBM_SETSCROLLINFO wParam = (WPARAM) fRedraw; 
    lParam = (LPARAM) (LPSCROLLINFO) lpsi;

Parameters

  • fRedraw
    Boolean value that specifies whether the scroll bar is redrawn to reflect the new scroll box position. If set to TRUE, the scroll bar is redrawn. If set to FALSE, the scroll bar is not redrawn.

  • lpsi
    Long pointer to a SCROLLINFO structure. Before sending the message, set the cbSize member of the structure to sizeof(SCROLLINFO), set the fMask member to indicate the parameters to set, and specify the new parameter values in the appropriate members.

    The fMask member can be a combination of the following values.

    Value

    Description

    SIF_DISABLENOSCROLL

    Disables the scroll bar instead of removing it, if the scroll bar's new parameters make the scroll bar unnecessary.

    SIF_PAGE

    Sets the scroll page to the value specified in the nPage member of the SCROLLINFO structure pointed to by lpsi.

    SIF_POS

    Sets the scroll position to the value specified in the nPos member of the SCROLLINFO structure pointed to by lpsi.

    SIF_RANGE

    Sets the scroll range to the value specified in the nMin and nMax members of the SCROLLINFO structure pointed to by lpsi.

Return Value

The current position of the scroll box indicates success.

Remarks

The messages that indicate scroll-bar position, WM_HSCROLL and WM_VSCROLL, provide only 16 bits of position data. However, the SCROLLINFO structure used by SBM_GETSCROLLINFO, SBM_SETSCROLLINFO, GetScrollInfo, and SetScrollInfo provides 32 bits of scroll-bar position data. You can use these messages and functions while processing either the WM_HSCROLL or WM_VSCROLL messages to obtain 32-bit scroll-bar position data.

If you pass a null pointer in the lpsi parameter (lParam), SBM_SETSCROLLINFO returns the current position of the scroll box.

Requirements

Header

commctrl.h

See Also

Reference

Scroll Bar Messages
SBM_GETSCROLLINFO
SCROLLINFO
WM_HSCROLL
WM_VSCROLL